Guess what, I've watched it trice within half a year, still cried as bad as my first watch lol, would be great if A-1 pictures made the next season, but that seems impossible :(

I hope they don't. The idea of pointless sequels to a completed story just ruins them and this is one of the most completed story's in anime. The whole point of the story is for closure. Not to say that I don't think it was good enough for a sequel as it was great, rather that creating a sequel would be a disservice to it. At best some sort of single OVA with them going back to visit her grave in another 10 years just so just to show where they end up would be possible as a sort of dénouement to wrap up the series for those invested in what happens after, but really anything more than that would be stretching it in my opinion.

One Piece.
There comes a time when you get too attached to a series and its characters that you just can't help yourself.
I've cried or at least shed a tear to most of the flashbacks in One Piece. The CP9 saga was just an emotional roller coaster for me. During that saga I shed some tears of sadness and tears of happiness.

AnoHana was a good series,Clannad ~AS~ was a wonderful watch.
Kanon 2006 & Air was also very Good, that Air ending ;(
One Piece had several points were I got really emotional and cried ...
ToraDora was really good.

And Angel Beats! ending scene got me, Bakuman had some emotional impact on me, also Elfen Lied, I cried in the ending when it was over ;(
Also 5 Centimeters Per Second.
Higurashi When They Cry. I just cried and couldn't continue with the series because I was so sad.

The Pet Girl of Sakurasou got me as did Shakugan no Shana, and Sola is also one of them.
Tengen Toppa Gurren Lagann had me cry for over a week ...
And of course, True Tears

Well, that are some series that have had a emotional impact on me and made me cry, that is pretty much all that I remember I have seen.

My personal Favourites of these would be ( as in the drama genre ) True Tears, AnoHana, Clannad ~AS~, Kanon 2006/Air and Elfen Lied/Angel Beats!

AnoHana probably made me cry the most, but I've cried a lot during Angel Beats!, Clannad: After Story, The Pet Girl of Sakurasou, SAO, Mirai Nikki, Guilty Crown, the end of Code Geass R2, Toradora!, Steins;Gate and some bits of Naruto.